Pest description and damage Pine needle scale are elongate, pure white scale which feed on the needles. Heavily infested trees may appear "flocked." Infested needles turn yellow, then brown. Twigs and branches may be killed. Repeated infestations may kill trees eventually. Pine needle scale often are found with the black pineleaf scale, which is gray to black instead of white. While pine needle scale is a serious pest of ornamental pines, it infests arborvitae, cedar, hemlock, spruce and Douglas-fir.
For biology, life history, monitoring and management
See "Scale insect" in: